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Grade: 12th pass

                        

if the sum of the series 2,5,8,11..... is 60100, then n is equal to??????

5 years ago

Answers : (6)

aarthi s
19 Points
							
Use the formula S=n/2[2a+(n-1)d]
substitute the values a=2, d=5-3 =2 & S=60100
Ans 200
5 years ago
mansi dabriwal
29 Points
							
i think d should be 5-2=3
5 years ago
Shubham Singh
199 Points
							
n = 200
it is an AP with common difference 3.
5 years ago
mansi dabriwal
29 Points
							
yah i got it...
5 years ago
Sujit Yadav
43 Points
							
ans 200
5 years ago
ng29
1698 Points
							
it is quite easy question 
it is nothing but an increasin ap with   a=2  d=3  and nth term is 60100
using an=a+(n-1)d      an is the nth term
we get n=200
 
approve if useful
5 years ago
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